CEPH_PREAMBLE_SECURE_LEN
u8 in_buf[CEPH_PREAMBLE_SECURE_LEN];
u8 out_buf[CEPH_PREAMBLE_SECURE_LEN];
sg_init_one(&sg, con->v2.in_buf, CEPH_PREAMBLE_SECURE_LEN);
return gcm_crypt(con, false, &sg, &sg, CEPH_PREAMBLE_SECURE_LEN);
sg_init_one(&sg, base, CEPH_PREAMBLE_SECURE_LEN);
CEPH_PREAMBLE_SECURE_LEN - CEPH_GCM_TAG_LEN);
add_out_kvec(con, base, CEPH_PREAMBLE_SECURE_LEN);
con_secure(con) ? CEPH_PREAMBLE_SECURE_LEN :
head_len = CEPH_PREAMBLE_SECURE_LEN;